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A numismatic collection requires careful preservation to protect the time, passion, and resources invested in it. The Air-Tite Model T Ring-Type capsule is the professional choice for safeguarding 21mm coins, keeping them pristine for generations.
Coin collecting faces threats from environmental contaminants, humidity, and improper handling, with non-chemically inert storage materials being particularly harmful. This guide highlights why the Air-Tite Model T capsule is the best defense against chemical corrosion, atmospheric damage, and physical wear, setting the standard for archival-quality coin protection.
The long-term preservation of a coin relies on its environment, with pollutants, humidity, and temperature fluctuations contributing to deterioration. Often, the most significant damage comes from the storage holder, making it crucial for collectors to understand archival-safe materials.
"Archival-safe" means materials that are chemically inert and stable for direct contact with collectibles, preventing degradation or harmful emissions. Trusted polymers like polyethylene, polypropylene, and acrylic are commonly used.
Air-Tite capsules, made in the USA from high-impact acrylic (PMMA), are known for their stability and optical clarity. They contain a UV stabilizer to prevent yellowing and degradation, ensuring they remain clear for decades, unlike inferior plastics that can become brittle and discolored.
A major concern for numismatists is PVC damage, an irreversible chemical corrosion caused by improper storage materials. Polyvinyl chloride (PVC) is often softened with plasticizers, making it cheap and flexible but harmful for long-term coin storage.
Heat and humidity cause plasticizers to break down, releasing hydrogen chloride gas that forms hydrochloric acid when combined with moisture. This acid attacks the surface of coins, especially those with copper alloys like U.S. nickels. Early signs of damage show as a milky residue, evolving into a sticky green film known as "green slime." This film actively corrodes the metal, leading to permanent damage that diminishes a coin's numismatic value.
The Air-Tite Model T capsule provides a definitive solution to the threat of chemical damage. Both the hard acrylic shell and the soft inner ring are guaranteed to be 100% free of PVC and its harmful plasticizers. The black ring is made from an inert, cross-linked polyethylene foam known as Volara, a material recognized for its archival stability. By choosing Air-Tite, collectors ensure their coins are housed in a chemically stable micro-environment, making them completely safe for indefinite, long-term archival storage.
Beyond material safety, the physical security of a coin within its holder is critical to its preservation. Loose-fitting holders can lead to subtle but cumulative damage over time. Air-Tite capsules are engineered with precision to immobilize the coin, providing a level of protection superior to that of standard flips or tubes and second only to permanent slabbing by professional grading services.
Air-Tite offers two capsule styles: "Direct Fit" and "Ring Type." Direct Fit holders are molded to a specific coin's diameter for a minimalist display, while the Ring-Type design provides superior protection.
The Model T capsule utilizes a foam ring inside the acrylic shell, serving key functions:
The Air-Tite capsule consists of two pieces—a base and a cover—that snap together with a secure, friction fit. This precision manufacturing process creates a tight seal that is highly resistant to the ingress of air and moisture, which are the primary catalysts for toning and corrosion. This secure seal is a key component of the capsule's archival design. While it is intentionally difficult to open without a tool, this ensures the protective barrier remains robust and uncompromised during handling and storage, safeguarding the coin within its stable micro-environment.
Properly encapsulating your coin is a simple process that ensures maximum protection. Follow these steps for a secure, professional result:
A numismatic collection requires careful preservation to protect the time, passion, and resources invested in it. The Air-Tite Model T Ring-Type capsule is the professional choice for safeguarding 21mm coins, keeping them pristine for generations.
Coin collecting faces threats from environmental contaminants, humidity, and improper handling, with non-chemically inert storage materials being particularly harmful. This guide highlights why the Air-Tite Model T capsule is the best defense against chemical corrosion, atmospheric damage, and physical wear, setting the standard for archival-quality coin protection.
The long-term preservation of a coin relies on its environment, with pollutants, humidity, and temperature fluctuations contributing to deterioration. Often, the most significant damage comes from the storage holder, making it crucial for collectors to understand archival-safe materials.
"Archival-safe" means materials that are chemically inert and stable for direct contact with collectibles, preventing degradation or harmful emissions. Trusted polymers like polyethylene, polypropylene, and acrylic are commonly used.
Air-Tite capsules, made in the USA from high-impact acrylic (PMMA), are known for their stability and optical clarity. They contain a UV stabilizer to prevent yellowing and degradation, ensuring they remain clear for decades, unlike inferior plastics that can become brittle and discolored.
A major concern for numismatists is PVC damage, an irreversible chemical corrosion caused by improper storage materials. Polyvinyl chloride (PVC) is often softened with plasticizers, making it cheap and flexible but harmful for long-term coin storage.
Heat and humidity cause plasticizers to break down, releasing hydrogen chloride gas that forms hydrochloric acid when combined with moisture. This acid attacks the surface of coins, especially those with copper alloys like U.S. nickels. Early signs of damage show as a milky residue, evolving into a sticky green film known as "green slime." This film actively corrodes the metal, leading to permanent damage that diminishes a coin's numismatic value.
The Air-Tite Model T capsule provides a definitive solution to the threat of chemical damage. Both the hard acrylic shell and the soft inner ring are guaranteed to be 100% free of PVC and its harmful plasticizers. The black ring is made from an inert, cross-linked polyethylene foam known as Volara, a material recognized for its archival stability. By choosing Air-Tite, collectors ensure their coins are housed in a chemically stable micro-environment, making them completely safe for indefinite, long-term archival storage.
Beyond material safety, the physical security of a coin within its holder is critical to its preservation. Loose-fitting holders can lead to subtle but cumulative damage over time. Air-Tite capsules are engineered with precision to immobilize the coin, providing a level of protection superior to that of standard flips or tubes and second only to permanent slabbing by professional grading services.
Air-Tite offers two capsule styles: "Direct Fit" and "Ring Type." Direct Fit holders are molded to a specific coin's diameter for a minimalist display, while the Ring-Type design provides superior protection.
The Model T capsule utilizes a foam ring inside the acrylic shell, serving key functions:
The Air-Tite capsule consists of two pieces—a base and a cover—that snap together with a secure, friction fit. This precision manufacturing process creates a tight seal that is highly resistant to the ingress of air and moisture, which are the primary catalysts for toning and corrosion. This secure seal is a key component of the capsule's archival design. While it is intentionally difficult to open without a tool, this ensures the protective barrier remains robust and uncompromised during handling and storage, safeguarding the coin within its stable micro-environment.
Properly encapsulating your coin is a simple process that ensures maximum protection. Follow these steps for a secure, professional result:
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